TY  - JOUR
A1  - Zaks, Michael A.
A1  - Pikovskij, Arkadij
T1  - Chimeras and complex cluster states in arrays of spin-torque oscillators
T2  - Scientific reports
N2  - We consider synchronization properties of arrays of spin-torque nano-oscillators coupled via an RC load. We show that while the fully synchronized state of identical oscillators may be locally stable in some parameter range, this synchrony is not globally attracting. Instead, regimes of different levels of compositional complexity are observed. These include chimera states (a part of the array forms a cluster while other units are desynchronized), clustered chimeras (several clusters plus desynchronized oscillators), cluster state (all oscillators form several clusters), and partial synchronization (no clusters but a nonvanishing mean field). Dynamically, these states are also complex, demonstrating irregular and close to quasiperiodic modulation. Remarkably, when heterogeneity of spin-torque oscillators is taken into account, dynamical complexity even increases: close to the onset of a macroscopic mean field, the dynamics of this field is rather irregular.
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/40216
SN  - 2045-2322
VL  - 7
PB  - Macmillan Publishers Limited
CY  - London
ER  -